CVE-2026-75916 SiYuan XSS-to-RCE via unescaped block metadata in hint popup

SiYuan through 3.7.3 contains a cross-site scripting vulnerability in the '' block-reference autocomplete hint popup. In genHintItemHTML app/src/protyle/hint/extend.ts, a candidate block's name, alias, and memo fields are concatenated into the popup's HTML without escaping. An attacker who can se...

CVE-2026-75916 SiYuan XSS-to-RCE via unescaped block metadata in hint popup

SiYuan through 3.7.3 contains a cross-site scripting vulnerability in the '' block-reference autocomplete hint popup. In genHintItemHTML app/src/protyle/hint/extend.ts, a candidate block's name, alias, and memo fields are concatenated into the popup's HTML without escaping. An attacker who can se...

CVE-2026-75916

In SiYuan through 3.7.3, genHintItemHTML() in app/src/protyle/hint/extend.ts concatenates block name, alias, and memo fields into HTML without escaping, enabling XSS via '((' autocomplete popups. Combined with nodeIntegration enabled, contextIsolation disabled, and no CSP, this escalates to arbit...